aspect ratio mkv

[chaussettdeguerr]

Hello everybody.
Sorry for my poor english, but i'd like to understand something about the width and height of the frames in some mkv i'm watching.
I have a pc with win7 and all shark007 codecs perfectly installed, and my problem is only with a few mkv files.
I can tell you that windows shows me the frames are 720/576 in the properties of the file. However, windows media player or other players play the file in 16/9 aspect ratio, and its very good aspect (how is it possible ?) ; but when i play the file on tv with it's own hardware player, the frames are rendered in about 4/3 format, according to the AR mentionned in the properties of the file in windows (and it's very bad aspect, the image is much too high).
I'd like to understand, and know if it's possible to correct it to 720/400 aspect and play correctly on both tv and media player on pc.
thanks a lot.

[chaussettdeguerr]

with media player classic, the file properies are :


video size: 1031x576

Video: MPEG4 Video (H264) 720x576 (213:119) 25.00fps [Video]
Audio: 0x4441 48000Hz stereo [Audio]

[Baldrick]

Your hardware player probably ignores the display aspect ratio in the mkv.

But check also with mediainfo and see what it says under aspect ratio. Post the details also, change to view->text in mediainfo and copy the video details.

[chaussettdeguerr]

Thanks Baldrick
here are the properies in mediainfo :

General
Unique ID : 145882239876371282477215820230551574916 (0x6DBFE5BCDF6884882831431145F29984)
Complete name : C:\temps\fringe\s3\fringe-s03e01.mkv
Format : Matroska
Format version : Version 2
File size : 389 MiB
Duration : 42mn 9s
Overall bit rate : 1 288 Kbps
Writing application : HandBrake rev5474
Writing library : libmkv 0.6.5

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.0
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 42mn 9s
Nominal bit rate : 1 170 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.113
Writing library : x264 core 130 r2273 b3065e6
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1,00:0,00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=5 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=10 / rc=2pass / mbtree=1 / bitrate=1170 / ratetol=1,0 / qcomp=0,60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20,0 / qblur=0,5 / vbv_maxrate=20000 / vbv_bufsize=25000 / nal_hrd=none / ip_ratio=1,40 / aq=1:1,00
Language : English
Default : Yes
Forced : No
Color primaries : BT.601 PAL
Transfer characteristics : BT.709
Matrix coefficients : BT.601

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 42mn 9s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Language : French
Default : Yes
Forced : No

Menu
00:00:00.000 : Chapter 1
00:01:29.040 : Chapter 2
00:10:07.600 : Chapter 3
00:19:06.600 : Chapter 4
00:23:27.000 : Chapter 5
00:27:19.000 : Chapter 6
00:34:27.600 : Chapter 7
00:41:32.000 : Chapter 8

[Baldrick]

You could always try remux(no video reconversion) it to a mp4 and see if your hardware player reads the display aspect ratio. Use for example mkvtomp4.

[chaussettdeguerr]

i'll perhaps give it a try.

You mean the player in windows correct the width/height according to display aspect ratio written in the properties?

[sanlyn]

Yes.

[jagabo]

Basically, any frame size can hold any display aspect ratio:

DAR = FAR * PAR

DAR = Display Aspect ratio, the shape of the final displayed picture
FAR = Frame Aspect Ratio, the stored frame dimensions
PAR = Pixel Aspect Ratio, the shape of individual pixels